CR1/3N 3V Lithium Battery Holder
thingiverse
Sometimes it's the simple things that are the most useful. I needed a small source of 3v power and stumbled upon the CR1/3N Battery. After welding solder tabs to the prototype, I figured that would really suck when I had to replace them so I dug in my spare parts drawer and found these battery contacts and voilà... exactly what I needed.
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